rustc not rust and cargo.

Author: rohe

.github/workflows/python-app.yml

@@ -29,8 +29,10 @@ jobs:
       uses: actions/setup-python@v2
       with:
         python-version: ${{ matrix.python-version }}
-    - name: Install rust
-      run: sudo apt-get install rust
+    - name: Install rustc and cargo
+      run: |
+        sudo apt-get install rustc
+        sudo apt install cargo
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip